CN111908785A - Ultralow-temperature helium-free cooling system for high-speed fiber drawing production - Google Patents
Ultralow-temperature helium-free cooling system for high-speed fiber drawing production Download PDFInfo
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Abstract
The invention relates to an ultralow temperature helium-free cooling system for high-speed drawing production of optical fibers, belonging to the technical field of optical fiber processing. The clean and dry compressed air control device comprises a compressed air upper air outlet, a compressed air middle air outlet, a plurality of floater flow switches, a plurality of pressure regulating valves and an air compressor; the multistage optical fiber cooling tank is respectively and separately sleeved with a heat preservation cover, one end of a refrigerating fluid communicating hose which is communicated and connected with the interior of the multistage optical fiber cooling tank is connected with the input end of a refrigeration circulator, the other end of the refrigerating fluid communicating hose is connected with the output end of the refrigeration circulator, an upper air outlet of compressed air is arranged in an upper air sealing device arranged at the top of the first stage optical fiber cooling tank and is connected with a float flow switch a, a middle air outlet of the compressed air is arranged in the third stage optical fiber cooling tank and is connected with a float flow switch; the upper end air sealing device is connected with a floater flow switch c, the lower end air sealing device is connected with a floater flow switch d, and the c and the d are connected with a pressure regulating valve b in parallel. The cooling speed is high, condensate water is prevented from being generated, the cooling energy consumption is low, and the cost is low.
Description
Technical Field
The invention relates to an ultralow temperature helium-free cooling system for high-speed drawing production of optical fibers, belonging to the technical field of optical fiber processing.
Background
The cooling procedure before the optical fiber high-speed drawing production and coating has important influence on the optical fiber coating quality, the optical fiber attenuation performance and the optical fiber drawing production speed. At present, optical fiber production enterprises adopt low-temperature cooling water to circulate in a cooling tank, and take helium as a medium to exchange heat between heat generated by optical fiber production and the cooling tank so as to cool optical fibers. Helium is a rare gas and is expensive, and the cooling rate of low-temperature cooling water is low, so that the optical fiber drawing production speed is directly influenced. Therefore, the low-temperature cooling system in the existing high-speed optical fiber drawing production process has the problems of high production cost and limitation on the increase of the production speed to cause the increase of the optical fiber manufacturing energy consumption. Therefore, it is necessary to develop an ultralow temperature helium-free cooling system for high-speed optical fiber drawing production, which utilizes clean and dry compressed air to replace helium, replaces original low-temperature cooling water with lower-temperature refrigerating fluid, effectively improves cooling rate, prevents condensate water from being generated, greatly reduces optical fiber cooling energy consumption and cost, is convenient to operate, has good cooling effect, ensures optical fiber coating quality, reduces optical fiber attenuation value, and improves the qualification rate of finished products.
Disclosure of Invention
The invention aims to provide the ultralow-temperature helium-free cooling system for the high-speed optical fiber drawing production, which has the advantages of high cooling speed, effective prevention of condensate water generation, low cooling energy consumption, low cost, convenience in operation and good cooling effect, and aims to solve the problems that the existing helium gas is expensive, the low cooling water cooling rate directly influences the optical fiber drawing production speed, and the cooling energy consumption and the cost are increased.
The invention realizes the purpose through the following technical scheme:
the utility model provides a high-speed wire drawing production of optic fibre is with ultra-low temperature no helium cooling system, it comprises clean dry compressed air controlling means, heat preservation cover, optic fibre cooling bath, refrigeration cycle ware, upper end atmoseal device and lower extreme atmoseal device, its characterized in that: the clean and dry compressed air control device comprises a compressed air upper air outlet, a compressed air middle air outlet, a plurality of floater flow switches, a plurality of pressure regulating valves and a compressed air preparation system; the heat-preservation cover consists of a stainless steel shell cover and rubber and plastic sponge; the optical fiber cooling tank is provided with six stages, the optical fiber cooling tank is respectively sleeved with a heat preservation cover in an isolation manner, the optical fiber cooling tanks are stacked and installed into a whole to form a drawing tower, a refrigerating fluid communicating hose is connected inside the drawing tower in a penetrating manner, one end of the refrigerating fluid communicating hose is connected with the input end of a refrigeration circulator, the other end of the refrigerating fluid communicating hose is connected with the output end of the refrigeration circulator, and refrigerating fluid of the refrigeration circulator circularly flows inside the drawing tower formed by the optical fiber cooling tanks from bottom to top through the refrigerating fluid communicating hose;
the top of the first-stage optical fiber cooling tank is provided with an upper end air seal device, and the bottom of the sixth-stage optical fiber cooling tank is provided with a lower end air seal device;
a compressed air upper air outlet is arranged in the first-stage optical fiber cooling tank, and a compressed air middle air outlet is arranged in the third-stage optical fiber cooling tank; the air outlet at the upper part of the compressed air is connected with a float flow switch a through a pipeline, the air outlet at the middle part of the compressed air is connected with a float flow switch b through a pipeline, and the other ends of the float flow switch a and the float flow switch b are connected with a pressure regulating valve a in parallel through pipelines; the upper end air sealing device is provided with a floater flow switch c through a pipeline, the lower end air sealing device is provided with a floater flow switch d through a pipeline, the floater flow switch c and the floater flow switch d are connected with a pressure regulating valve b in parallel through a pipeline, and the other ends of the pressure regulating valve a and the pressure regulating valve b are connected in parallel and connected with a compressed air preparation system through a pipeline; and the float flow switch a, the float flow switch b, the float flow switch c, the float flow switch d, the pressure regulating valve a and the pressure regulating valve b are regulated to ensure that the compressed air filled into the heat-insulating cover is clean low dew point compressed air to prevent the generation of condensed water, the clean low dew point compressed air is taken as a heat transfer medium to ensure that the high-temperature optical fiber performs heat exchange in the wire drawing tower, and the generated heat is finally transmitted and dissipated through a refrigerant generated by a refrigeration circulator.
The range of the pressure regulating valve a and the pressure regulating valve b is as follows: 0-10 bar, the pressure regulating value is different, and when the pressure regulating value of the pressure regulating valve a is 2.2-2.5 bar, the pressure regulating value of the pressure regulating valve b is 2.5-3 bar.
The ranges of the float flow switch a and the float flow switch b are as follows: 5 ~ 50LPM, float flow switch c and float flow switch d's span is: 1-20 LPM, wherein the flow rates are different, and when the flow values of the float flow switch a and the float flow switch b are 35-40 LPM and 20-25 LPM respectively; the flow values of the float flow switch c and the float flow switch d are 10-15 LPM and 5-10 LPM respectively.
The refrigerating fluid prepared by the refrigerating circulator is lower than or equal to-5 ℃.
The heat preservation covers of the first-stage optical fiber cooling groove and the fourth-stage optical fiber cooling groove in the insulation sleeving mode are respectively provided with a digital display hygrothermograph.
The stainless steel shell cover of the heat-preservation cover is made of a 304 stainless steel plate with the thickness of 2mm, and rubber and plastic sponge is attached and filled in the stainless steel shell cover; the window of the heat-insulating cover is made of an aluminum alloy frame and organic glass, and heat exchange between the optical fiber cooling tank and the external environment is isolated.
The upper end air sealing device and the lower end air sealing device are respectively composed of copper assembly parts, compressed air forms air sealing through a through-flow gap formed by conical surfaces between the copper assembly parts of the upper end air sealing device and the lower end air sealing device, and air outside the heat-insulating cover is prevented from entering the heat-insulating cover.
Compared with the prior art, the invention has the beneficial effects that:
the ultralow-temperature helium-free cooling system for high-speed fiber drawing production adopts a clean and dry compressed air control device, and uses clean compressed air with low dew point to replace helium as a heat-conducting medium to realize heat exchange between a high-temperature optical fiber and an optical fiber cooling tank; and the compressed air control device with clean low dew point is matched with the upper end air sealing device and the lower end air sealing device to control the air dew point in the heat-insulating cover, so that the generation of condensed water is prevented. Refrigerating fluid with temperature lower than-5 ℃ prepared by a refrigerating circulator replaces original cooling water with temperature of 20 ℃, so that the cooling rate of the high-temperature optical fiber is effectively improved; the heat preservation cover isolated from the drawing tower is manufactured, heat exchange between heat-conducting air and the external environment of the drawing tower is isolated, energy consumption and cost of optical fiber cooling are greatly reduced, coating quality of the optical fiber is guaranteed, and attenuation of the optical fiber finished product is effectively reduced; greatly improving the speed of optical fiber drawing production. The cooling speed is fast, the operation is convenient, and the cooling effect is good. The problems that the existing helium is expensive, the cooling rate of low-temperature cooling water is low, the optical fiber drawing production speed is directly influenced, and the cooling energy consumption and the cost are increased are solved.
Drawings
FIG. 1 is a schematic structural diagram of an ultralow temperature helium-free cooling system for high-speed drawing production of optical fibers;
fig. 2 is a schematic structural diagram of a clean and dry compressed air control device.
In the figure: 1, a clean and dry compressed air control device; 2, a heat preservation cover; 3, an optical fiber cooling tank; 4 refrigerating fluid communication hose; 5 a refrigeration cycle; 6, an upper end air sealing device; 7, a lower end air sealing device; and 8, a digital display hygrothermograph.
1-1 compressing air at the upper air outlet; 1-2, compressing air at a middle air outlet; 1-3 float flow switch a; 1-4 float flow switch b; 1-5 float flow switch c; 1-6 float flow switch d; 1-7 pressure regulating valve a; 1-8 pressure regulating valve b.
Detailed Description
The following describes in detail an embodiment of the ultralow temperature helium-free cooling system for high-speed drawing production of optical fibers with reference to fig. 1 to 2:
the ultralow temperature helium-free cooling system for high-speed fiber drawing production is composed of a clean dry compressed air control device 1, a heat insulation cover 2, an optical fiber cooling tank 3, a refrigeration circulator 5, an upper end air seal device 6 and a lower end air seal device 7; the clean and dry compressed air control device 1 comprises a compressed air upper air outlet 1-1, a compressed air middle air outlet 1-2, a plurality of float flow switches, a plurality of pressure regulating valves and a compressed air preparation system; the heat preservation cover 2 consists of a stainless steel shell cover and rubber and plastic sponge; the optical fiber cooling tank 3 has six stages, the six-stage optical fiber cooling tank 3 is respectively and separately sleeved with a heat preservation cover 2, the six-stage optical fiber cooling tank 3 is installed to form a drawing tower integrally, a refrigerating fluid communication hose 4 is connected in the drawing tower in a through mode, one end of the refrigerating fluid communication hose 4 is connected with the input end of a refrigeration circulator 5, the other end of the refrigerating fluid communication hose 4 is connected with the output end of the refrigeration circulator 5, and refrigerating fluid of the refrigeration circulator 5 circularly flows from bottom to top in the drawing tower formed by the multistage optical fiber cooling tanks 3 through the refrigerating fluid communication hose 4;
the top of the first-stage optical fiber cooling tank 3 is provided with an upper end air seal device 6, and the bottom of the sixth-stage optical fiber cooling tank 3 is provided with a lower end air seal device 6; a compressed air upper air outlet 1-1 is arranged inside the first-stage optical fiber cooling tank 3, and a compressed air middle air outlet 1-2 is arranged inside the third-stage optical fiber cooling tank 3; the air outlet 1-1 at the upper part of the compressed air is connected with a float flow switch a1-3 through a pipeline, the air outlet 1-2 at the middle part of the compressed air is connected with a float flow switch b1-4 through a pipeline, and the other ends of the float flow switch a1-3 and the float flow switch b1-4 are connected with a pressure regulating valve a1-7 in parallel through a pipeline; the upper end air sealing device 6 is provided with a float flow switch c1-5 through a pipeline, the lower end air sealing device 7 is provided with a float flow switch d1-6 through a pipeline, the float flow switch c1-5 and the float flow switch d1-6 are connected with a pressure regulating valve b1-8 through a pipeline in parallel, and the other ends of the pressure regulating valve a1-7 and the pressure regulating valve b1-8 are connected in parallel and connected with a compressed air preparation system through a pipeline; and the floater flow switch a1-3, the floater flow switch b1-4, the floater flow switch c1-5, the floater flow switch d1-6, the pressure regulating valve a1-7 and the pressure regulating valve b1-8 are regulated to ensure that the compressed air filled in the heat insulation cover 2 is clean low dew point compressed air and prevent the generation of condensed water, the clean low dew point compressed air is taken as a heat transfer medium, so that the high-temperature optical fiber performs heat exchange in the fiber drawing tower, and the generated heat is finally transmitted and dissipated by the refrigerant generated by the refrigeration circulator 5.
The range of the pressure regulating valve a1-7 and the range of the pressure regulating valve b1-8 are as follows: 0-10 bar, the pressure regulating value is different, and when the pressure regulating value of the pressure regulating valve a is 2.2-2.5 bar, the pressure regulating value of the pressure regulating valve b is 2.5-3 bar.
The ranges of the float flow switch a1-3 and the float flow switch b1-4 are as follows: 5-50 LPM, the range of the float flow switch c1-5 and the float flow switch d1-6 is as follows: 1-20 LPM, the flow rates are different, and when the flow rates of the float flow switch a1-3 and the float flow switch b1-4 are 35-40 LPM and 20-25 LPM respectively, the flow rates of the float flow switch c1-5 and the float flow switch d1-6 are 10-15 LPM and 5-10 LPM respectively. The refrigerating fluid produced by the refrigeration circulator 5 is less than or equal to-5 ℃. And the thermal insulation cover 2 which is sleeved with the first-stage optical fiber cooling groove 3 and the fourth-stage optical fiber cooling groove 3 in an isolating way is respectively provided with a digital display hygrothermograph 8. The stainless steel shell cover of the heat-insulation cover 2 is made of a 304 stainless steel plate with the thickness of 2mm, and rubber and plastic sponge is attached and filled in the stainless steel shell cover; the window of the heat preservation cover 2 is made of an aluminum alloy frame and organic glass, and heat exchange between the optical fiber cooling tank 3 and the external environment is isolated. The upper end air sealing device 6 and the lower end air sealing device 7 are respectively composed of copper assembly parts, compressed air forms air sealing through a through-flow gap formed by conical surfaces between the two copper assembly parts of the upper end air sealing device 6 and the lower end air sealing device 7, and air outside the heat-insulating cover 2 is prevented from entering the heat-insulating cover 2.
The pressure regulating valve a1-7, the float flow switch a1-3 and the float flow switch b1-4 are matched to control the input quantity and the flow rate of the clean low dew point compressed air entering the heat preservation cover 2; the dew point of air in the heat preservation cover 2 is adjusted, so that condensed water is prevented from being formed on the surface of the multistage optical fiber cooling tank 3, and the waste of compressed air caused by overlarge ventilation quantity is prevented. The temperature distribution of the inner space of the heat-insulating cover 2 is high at the upper end and low at the lower end, so that the saturated steam at the upper end in the heat-insulating cover 2 is high in pressure, and water is gathered at the upper end; the air insulation in the heat preservation cover 2 presents a high-low situation to the humidity distribution, and condensed water is easily formed at the upper end, so that a compressed air upper air outlet 1-1 is arranged at the top of the heat preservation cover 2 sleeved with the first-stage optical fiber cooling tank 3, and a compressed air middle air outlet 1-2 is arranged at the heat preservation cover 2 sleeved with the third-stage optical fiber cooling tank 3, so as to avoid the occurrence of the condensed water.
The pressure regulating valve b1-8, the float flow switch c1-5 and the float flow switch d1-6 are matched to respectively control the flow and the pressure entering the upper end air sealing device 6 and the lower end air sealing device 7, and the upper end air sealing device 6 and the lower end air sealing device 7 form air sealing by utilizing the space formed between the respective copper components and the through-flow gaps formed between the respective two conical surfaces.
The upper part and the middle part of the heat-insulating cover 2 correspond to the first optical fiber cooling groove 3 and the fourth optical fiber cooling groove 3, and are respectively provided with a digital display hygrothermograph 8 for monitoring the temperature, the humidity and the dew point of the air in the heat-insulating cover 2.
The working process of the ultralow-temperature helium-free cooling system for high-speed drawing production of the optical fiber comprises the following steps:
before the high-speed drawing of the optical fiber is started, firstly cleaning a multistage optical fiber cooling groove 3 in a heat-insulating cover 2; then respectively adjusting the pressure and the flow of a pressure regulating valve a1-7, a pressure regulating valve b1-8, a float flow switch a1-3, a float flow switch b1-4, a float flow switch c1-5 and a float flow switch d 1-6; and then closing the window of the heat preservation cover 2, keeping the window at the lowest end of the heat preservation cover to be opened for 5 minutes +/-5 seconds, and completely closing the window of the heat preservation cover 2 tightly. Starting the refrigeration circulator 5 after the optical fiber high-speed drawing is started, and setting the temperature of a refrigerant of the refrigeration circulator 5 according to the requirement of the optical fiber high-speed drawing production process, wherein the temperature is set to be lower than or equal to-5 ℃; the temperature starts to gradually decrease until the set temperature is reached.
After the temperature of the refrigerant is stabilized below minus 5 ℃, monitoring the temperature, the humidity and the dew point in the heat-insulating cover 2 by a digital display hygrothermograph 8, and adjusting the temperature of the clean and dry air in the heat-insulating cover 2 by setting different temperatures of the refrigeration circulator 5; the dew point in the heat preservation cover 2 is adjusted by adjusting the pressure regulating valve a1-7, the float flow switch a1-3 and the float flow switch b1-4, so that the generation of condensed water is prevented. The air volume of the upper end air sealing device 6 and the lower end air sealing device 7 is respectively adjusted through the coordination of the pressure regulating valve b1-8, the float flow switch c1-5 and the float flow switch d1-6, and the air volume is gradually increased along with the increase of the optical fiber drawing speed. The ultralow-temperature helium-free cooling system for high-speed fiber drawing production completely achieves the purposes of high cooling speed, effective prevention of condensate water generation, low cooling energy consumption, low cost, convenient operation and guarantee of drawing quality.
While the foregoing is directed to embodiments of the present invention, other and further embodiments of the invention may be devised without departing from the basic scope thereof, and the scope thereof is determined by the claims that follow.
Claims (7)
1. The utility model provides a high-speed wire drawing production of optic fibre is with ultra-low temperature no helium cooling system, it comprises clean dry compressed air controlling means (1), heat preservation cover (2), optic fibre cooling bath (3), refrigeration cycle ware (5), upper end atmoseal device (6) and lower extreme atmoseal device (7), its characterized in that: the clean and dry compressed air control device (1) comprises a compressed air upper air outlet (1-1), a compressed air middle air outlet (1-2), a plurality of float flow switches, a plurality of pressure regulating valves and a compressed air preparation system; the heat-preservation cover (2) consists of a stainless steel shell cover and rubber-plastic sponge; the optical fiber cooling tank (3) is in six stages, a heat preservation cover (2) is sleeved on the optical fiber cooling tank (3) in an isolation mode, the optical fiber cooling tank (3) is stacked and installed to form a drawing tower integrally, a refrigerating fluid communication hose (4) is connected to the inside of the drawing tower in a penetrating mode, one end of the refrigerating fluid communication hose (4) is connected with the input end of a refrigerating circulator (5), the other end of the refrigerating fluid communication hose (4) is connected with the output end of the refrigerating circulator (5), and refrigerating fluid of the refrigerating circulator (5) circularly flows from bottom to top inside the drawing tower formed by the optical fiber cooling tank (3) through the refrigerating fluid communication hose (4);
an upper end air seal device (6) is arranged at the top of the first-stage optical fiber cooling tank (3), and a lower end air seal device (7) is arranged at the bottom of the sixth-stage optical fiber cooling tank (3);
a compressed air upper air outlet (1-1) is arranged inside the first-stage optical fiber cooling tank (3), and a compressed air middle air outlet (1-2) is arranged inside the third-stage optical fiber cooling tank (3); the air outlet (1-1) at the upper part of the compressed air is connected with a floater flow switch a (1-3) through a pipeline, the air outlet (1-2) at the middle part of the compressed air is connected with a floater flow switch b (1-4) through a pipeline, and the other ends of the floater flow switch a (1-3) and the floater flow switch b (1-4) are connected with a pressure regulating valve a (1-7) in parallel through a pipeline; the upper end air sealing device (6) is provided with a floater flow switch c (1-5) through a pipeline, the lower end air sealing device (7) is provided with a floater flow switch d (1-6) through a pipeline, the floater flow switch c (1-5) and the floater flow switch d (1-6) are connected with a pressure regulating valve b (1-8) in parallel through a pipeline, and the other ends of the pressure regulating valve a (1-7) and the pressure regulating valve b (1-8) are connected in parallel and connected with a compressed air preparation system through a pipeline; the floater flow switch a (1-3), the floater flow switch b (1-4), the floater flow switch c (1-5), the floater flow switch d (1-6), the pressure regulating valve a (1-7) and the pressure regulating valve b (1-8) are regulated, so that the compressed air filled into the heat-insulating cover (2) is clean low-dew-point compressed air, and the generation of condensed water is prevented; and the clean low dew point compressed air is used as a heat transfer medium, so that the high-temperature optical fiber performs heat exchange in the drawing tower, and the generated heat is finally transferred and dissipated through a refrigerant generated by the refrigeration circulator (5).
2. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the ranges of the pressure regulating valves a (1-7) and b (1-8) are as follows: 0-10 bar; the pressure regulating values are different, and when the pressure regulating value of the pressure regulating valve a (1-7) is 2.2-2.5 bar, the pressure regulating value of the pressure regulating valve b (1-8) is 2.5-3 bar.
3. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the ranges of the float flow switch a (1-3) and the float flow switch b (1-4) are as follows: 5-50 LPM, the range of the float flow switch c (1-5) and the float flow switch d (1-6) is as follows: 1-20 LPM, wherein the flow rates are different, and when the flow values of the float flow switch a (1-3) and the float flow switch b (1-4) are 35-40 LPM and 20-25 LPM respectively; the flow values of the float flow switch c (1-5) and the float flow switch d (1-6) are respectively 10-15 LPM and 5-10 LPM.
4. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the refrigerating fluid prepared by the refrigerating circulator (5) is lower than or equal to-5 ℃.
5. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the first stage optical fiber cooling tank (3) andfourth stageDigital display hygrothermographs (8) are respectively arranged on the heat preservation covers (2) which are separately sleeved on the optical fiber cooling grooves (3).
6. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the stainless steel shell cover of the heat-insulation cover (2) is made of a 304 stainless steel plate with the thickness of 2mm, and rubber and plastic sponge is filled in the stainless steel shell cover in an attaching mode; the window of the heat-insulating cover (2) is made of an aluminum alloy frame and organic glass, and heat exchange between the optical fiber cooling tank (3) and the external environment is isolated.
7. The ultra-low temperature helium-free cooling system for high-speed drawing production of optical fibers according to claim 1, characterized in that: the upper end air sealing device (6) and the lower end air sealing device (7) are composed of copper assemblies, compressed air respectively passes through a through-flow gap formed by conical surfaces between the two copper assemblies of the upper end air sealing device (6) and the lower end air sealing device (7) to form air sealing, and air outside the heat-insulating cover (2) is prevented from entering the heat-insulating cover (2).
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| CN206767940U (en) * | 2017-04-27 | 2017-12-19 | 江苏南方天宏通信科技有限公司 | A kind of optical fiber cooling apparatus |
| CN107601846A (en) * | 2017-10-30 | 2018-01-19 | 长飞光纤光缆股份有限公司 | Optical fiber cooling apparatus for high-speed wire-drawing |
| CN107759072A (en) * | 2017-11-10 | 2018-03-06 | 江苏南方光纤科技有限公司 | Full-automatic optical fibre drawing cooling system and cooling means |
| CN207811583U (en) * | 2018-02-08 | 2018-09-04 | 湖北凯乐量子通信光电科技有限公司 | A kind of with protecting cover wire-drawer-tower optical fiber cooling apparatus |
| CN209383665U (en) * | 2018-09-12 | 2019-09-13 | 威海威信光纤科技有限公司 | Optical fiber rapid cooling but device |
| CN110683752A (en) * | 2019-11-19 | 2020-01-14 | 赣州讯飞腾传导技术有限公司 | Optical fiber drawing cooling system and cooling method thereof |
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